These diagrams illustrate the Munsell System of Color Notation, and are reproduced through the courtesy of the International Printing Ink Corporation from Three Monographs on Color, a publication of unusual interest and beauty.

The countless hues, and their modifications, used in science, art. and industry required orderly arrangement, and some method of accurate identification. This need produced several color systems, of which A. H. Munsell's A System of Color Notation is the most widely used commercially.

A. 1. Hue indicates the spectral wave length of a color

and its position in the color circle. 2. In Munsell's notation, hue is indicated by its initial letter.

B. 1. Value, or brightness, indicates a color's approach to

white or black. 2. In this system, it is indicated by a number written above a diagonal line.

C. 1. Chroma, intensity, saturation, are here shown as a

number of steps away from neutral gray toward full chroma, on the hue at its greatest intensity or saturation.

D. 1. The three qualities of color, hue, value, and chroma,

are clearly shown in this diagram. 2. R 4/14 indicates a brilliant, intense red, and G 8/13 a light, gray green.

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A. The Hue Circuit.

Wh,u

Another version of these relationships is found in 42 7B.

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B. The Value Scale.

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C. Chroma Steps.

D. Correlation of Three Dimensions of Color.

SCALE .8 International Printing Ink Corporation. New York City. "Color ia U*e" No. 3 of a Scric* of 3 Monograph* on Color, 193S